X
An unknown quantity or unknown value.
Dictionary · English 5
Vocabulary ranked by real-world frequency — start with the 1,000 most common words. Definitions adapted from Wiktionary (CC BY-SA 4.0), review in progress.
Tiếng Việt English Idioms & phrases →
Frequency: All Top 1,000 1,001–5,000
Xbox
Any of the home consoles in Microsoft's Xbox product line, especially the original Xbox.
xi
The 14th letter of Classical and Modern Greek. The 15th in Ancient and Old Greek.
XXX
Extreme or hardcore pornography; or, less strictly, any pornographic content.
XL
A designation for a trim level within a model of trucks; it denotes midrange features.